PSET                     Draw Point on Screen

 PSET [STEP] (x,y) [,color]

    Plots a point at a specified screen location.

        STEP    If included, coordinates are relative to last graphics
                point referenced (LPR). If omitted, coordinates are
                absolute.

         x,y    Screen coordinates (column, row) in pixels.

       color    Specifies the attribute of the point to be plotted. If
                color is omitted, the point is plotted in the current
                foreground color. See the PALETTE statement for a list of
                available attributes for each screen mode.

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      Notes:    PRESET is exactly the same statement, except that it plots
                by default in the current background color. Therefore,
                without color arguments, PSET turns pixels on, while
                PRESET turns them off.